Maybe fix problems with symlinks (#956)

common/src/main/java/me/lucko/luckperms/common/dependencies/DependencyManager.java

@@ -33,6 +33,7 @@ import me.lucko.luckperms.common.dependencies.relocation.Relocation;
 import me.lucko.luckperms.common.dependencies.relocation.RelocationHandler;
 import me.lucko.luckperms.common.plugin.LuckPermsPlugin;
 import me.lucko.luckperms.common.storage.StorageType;
+import me.lucko.luckperms.common.utils.MoreFiles;
 
 import java.io.IOException;
 import java.io.InputStream;
@@ -82,7 +83,7 @@ public class DependencyManager {
     private Path getSaveDirectory() {
         Path saveDirectory = this.plugin.getBootstrap().getDataDirectory().resolve("lib");
         try {
-            Files.createDirectories(saveDirectory);
+            MoreFiles.createDirectoriesIfNotExists(saveDirectory);
         } catch (IOException e) {
             throw new RuntimeException("Unable to create lib directory", e);
         }

common/src/main/java/me/lucko/luckperms/common/storage/dao/file/AbstractConfigurateDao.java

@@ -57,7 +57,6 @@ import ninja.leaping.configurate.SimpleConfigurationNode;
 import ninja.leaping.configurate.Types;
 
 import java.io.IOException;
-import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.Collection;
@@ -132,7 +131,7 @@ public abstract class AbstractConfigurateDao extends AbstractDao {
     @Override
     public void init() throws IOException {
         this.dataDirectory = this.plugin.getBootstrap().getDataDirectory().resolve(this.dataDirectoryName);
-        Files.createDirectories(this.dataDirectory);
+        MoreFiles.createDirectoriesIfNotExists(this.dataDirectory);
 
         this.uuidDataFile = MoreFiles.createFileIfNotExists(this.dataDirectory.resolve("uuidcache.txt"));
         this.uuidCache.load(this.uuidDataFile);

common/src/main/java/me/lucko/luckperms/common/utils/MoreFiles.java

@@ -39,7 +39,7 @@ public final class MoreFiles {
     }
 
     public static Path createDirectoryIfNotExists(Path path) throws IOException {
-        if (Files.exists(path) && Files.isDirectory(path)) {
+        if (Files.exists(path) && (Files.isDirectory(path) || Files.isSymbolicLink(path))) {
             return path;
         }
 
@@ -47,5 +47,14 @@ public final class MoreFiles {
         return path;
     }
 
+    public static Path createDirectoriesIfNotExists(Path path) throws IOException {
+        if (Files.exists(path) && (Files.isDirectory(path) || Files.isSymbolicLink(path))) {
+            return path;
+        }
+
+        Files.createDirectories(path);
+        return path;
+    }
+
     private MoreFiles() {}
 }

sponge/src/main/java/me/lucko/luckperms/sponge/LPSpongeBootstrap.java

@@ -32,6 +32,7 @@ import me.lucko.luckperms.common.dependencies.classloader.PluginClassLoader;
 import me.lucko.luckperms.common.dependencies.classloader.ReflectionClassLoader;
 import me.lucko.luckperms.common.plugin.SchedulerAdapter;
 import me.lucko.luckperms.common.plugin.bootstrap.LuckPermsBootstrap;
+import me.lucko.luckperms.common.utils.MoreFiles;
 import me.lucko.luckperms.sponge.utils.VersionData;
 
 import org.slf4j.Logger;
@@ -53,7 +54,6 @@ import org.spongepowered.api.scheduler.SynchronousExecutor;
 
 import java.io.IOException;
 import java.io.InputStream;
-import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.Optional;
 import java.util.UUID;
@@ -242,7 +242,7 @@ public class LPSpongeBootstrap implements LuckPermsBootstrap {
     public Path getDataDirectory() {
         Path dataDirectory = this.game.getGameDirectory().toAbsolutePath().resolve("luckperms");
         try {
-            Files.createDirectories(dataDirectory);
+            MoreFiles.createDirectoriesIfNotExists(dataDirectory);
         } catch (IOException e) {
             e.printStackTrace();
         }

sponge/src/main/java/me/lucko/luckperms/sponge/LPSpongePlugin.java

@@ -45,6 +45,7 @@ import me.lucko.luckperms.common.sender.Sender;
 import me.lucko.luckperms.common.tasks.CacheHousekeepingTask;
 import me.lucko.luckperms.common.tasks.ExpireTemporaryTask;
 import me.lucko.luckperms.common.treeview.PermissionRegistry;
+import me.lucko.luckperms.common.utils.MoreFiles;
 import me.lucko.luckperms.sponge.calculators.SpongeCalculatorFactory;
 import me.lucko.luckperms.sponge.commands.SpongeMainCommand;
 import me.lucko.luckperms.sponge.contexts.SpongeContextManager;
@@ -223,7 +224,7 @@ public class LPSpongePlugin extends AbstractLuckPermsPlugin {
         Path path = this.bootstrap.getConfigPath().resolve("luckperms.conf");
         if (!Files.exists(path)) {
             try {
-                Files.createDirectories(this.bootstrap.getConfigPath());
+                MoreFiles.createDirectoriesIfNotExists(this.bootstrap.getConfigPath());
                 try (InputStream is = getClass().getClassLoader().getResourceAsStream("luckperms.conf")) {
                     Files.copy(is, path);
                 }

sponge/src/main/java/me/lucko/luckperms/sponge/service/persisted/SubjectStorage.java

@@ -31,6 +31,7 @@ import com.google.gson.GsonBuilder;
 import com.google.gson.JsonObject;
 
 import me.lucko.luckperms.common.utils.ImmutableCollectors;
+import me.lucko.luckperms.common.utils.MoreFiles;
 import me.lucko.luckperms.sponge.service.model.LPPermissionService;
 
 import java.io.BufferedReader;
@@ -101,7 +102,7 @@ public class SubjectStorage {
     private Path resolveFile(String collectionIdentifier, String subjectIdentifier) {
         Path collection = this.container.resolve(collectionIdentifier);
         try {
-            Files.createDirectories(collection);
+            MoreFiles.createDirectoriesIfNotExists(collection);
         } catch (IOException e) {
             e.printStackTrace();
         }
@@ -128,7 +129,7 @@ public class SubjectStorage {
      * @throws IOException if the write fails
      */
     public void saveToFile(SubjectDataContainer container, Path file) throws IOException {
-        Files.createDirectories(file.getParent());
+        MoreFiles.createDirectoriesIfNotExists(file.getParent());
         try (BufferedWriter writer = Files.newBufferedWriter(file, StandardCharsets.UTF_8)) {
             this.gson.toJson(container.serialize(), writer);
             writer.flush();